(People) - Barack Obama, who swept to historic victory in the U.S. presidential race four years ago, held on to his job Tuesday. His victory came in a much more tightly contested election against Mitt Romney – earning four more years in the White House and vowing to usher in a brighter future for the country and its people, many of whom struggled mightily in his first term. The first broadcast networks called the race for Obama at 11:18 p.m. ET. Romney later told supporters in Boston, "I have just called President Obama to congratulate him on his victory."